.sudoku_box {
  width: 100%;
  height: 100%;
}

.font {
  margin-left: 90px;
  font-size: 48px;
  letter-spacing: 28px;
  color: #ea1212;
}

.left_font {
  float: left;
  color: #ea1212;
  font-size: 48px;
  margin-left: 30px;
  margin-top: 30px;
  letter-spacing: 28px;
  writing-mode: vertical-lr;
}

ul,
li {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

.wrap {
  width: 495px;
  height: 495px;
  margin: 0 auto;
  padding: 0 0 5px 5px;
  overflow: hidden;
  background: #000000;
  position: relative;
}

.wrap li {
  width: 50px;
  height: 50px;
  line-height: 50px;
  margin: 5px 5px 0 0;
  text-align: center;
  background: #ffffff;
  float: left;
  position: relative;
}

.wrap li a {
  width: 50px;
  height: 50px;
  display: block;
  font-size: 45px;
  text-decoration: none;
  color: #0b21ebd8;
}

.wrap li b {
  width: 50px;
  height: 50px;
  display: block;
  display: block;
  font-size: 45px;
  text-decoration: none;
  color: #bc9807d2;
}
